Canister



FIG. 1 is a top, front, right side perspective view of a canister showing my new design;

FIG. 2 is a top plan thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a left side elevation view thereof. 

The ornamental design for a canister, substantially as shown. 